linux-kernel - [PATCH 3/7] KVM: x86/MMU: Move gfn_to

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Message-ID: <20221206173601.549281-4-bgardon@google.com>
Date:   Tue,  6 Dec 2022 17:35:57 +0000
From:   Ben Gardon <bgardon@...gle.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Vipin Sharma <vipinsh@...gle.com>,
        Ben Gardon <bgardon@...gle.com>
Subject: [PATCH 3/7] KVM: x86/MMU: Move gfn_to_rmap() to rmap.c

Move gfn_to_rmap() to rmap.c. While the function is not part of
manipulating the rmap, it is the main way that the MMU gets pointers to
the rmaps.

No functional change intended.

Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
 arch/x86/kvm/mmu/mmu.c  | 9 ---------
 arch/x86/kvm/mmu/rmap.c | 8 ++++++++
 arch/x86/kvm/mmu/rmap.h | 2 ++
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index c3a7f443a213..f8d7201210c8 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -891,15 +891,6 @@ static bool kvm_zap_all_rmap_sptes(struct kvm *kvm,
 	return true;
 }
 
-static struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
-					 const struct kvm_memory_slot *slot)
-{
-	unsigned long idx;
-
-	idx = gfn_to_index(gfn, slot->base_gfn, level);
-	return &slot->arch.rmap[level - PG_LEVEL_4K][idx];
-}
-
 static bool rmap_can_add(struct kvm_vcpu *vcpu)
 {
 	struct kvm_mmu_memory_cache *mc;
diff --git a/arch/x86/kvm/mmu/rmap.c b/arch/x86/kvm/mmu/rmap.c
index c3bad366b627..272e89147d96 100644
--- a/arch/x86/kvm/mmu/rmap.c
+++ b/arch/x86/kvm/mmu/rmap.c
@@ -200,3 +200,11 @@ u64 *rmap_get_next(struct rmap_iterator *iter)
 	return sptep;
 }
 
+struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
+				  const struct kvm_memory_slot *slot)
+{
+	unsigned long idx;
+
+	idx = gfn_to_index(gfn, slot->base_gfn, level);
+	return &slot->arch.rmap[level - PG_LEVEL_4K][idx];
+}
diff --git a/arch/x86/kvm/mmu/rmap.h b/arch/x86/kvm/mmu/rmap.h
index 13b265f3a95e..45732eda57e5 100644
--- a/arch/x86/kvm/mmu/rmap.h
+++ b/arch/x86/kvm/mmu/rmap.h
@@ -49,4 +49,6 @@ u64 *rmap_get_next(struct rmap_iterator *iter);
 	for (_spte_ = rmap_get_first(_rmap_head_, _iter_);		\
 	     _spte_; _spte_ = rmap_get_next(_iter_))
 
+struct kvm_rmap_head *gfn_to_rmap(gfn_t gfn, int level,
+				  const struct kvm_memory_slot *slot);
 #endif /* __KVM_X86_MMU_RMAP_H */
-- 
2.39.0.rc0.267.gcb52ba06e7-goog